Michael Darby wanted to make something like a Star Trek combadge that would respond to voice commands. He took a Raspberry Pi Zero W, a Pimoroni Speaker pHAT, a momentary touch sensor breakout board, some power circuitry and a USB microphone and constructed something that could be worn on the chest. When pressed, the touch sensor would trigger the Zero to listen, through the microphone, and then respond accordingly. The Pi runs Jasper to interpret the voice commands and has to be trained to know what to do. You can read about how Michael constructed the combadge over on his blog and see a video of it in action below: